<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                     v-for="item of hot"
                      :key="item.id"
                      @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                v-for="(item, key) of cities"
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                >
                    <div class="item border-bottom">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
    //   this.$store.dispatch('changeCity', city)
    // 省略diapatch调用actions的步骤，直接调用mutations
    //   this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      console.log(this.letter)
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color: #ccc
        &:after
            border-color: #ccc
    .border-topbottom
        &:before
            border-color: #ccc
    .list
        position: absolute
        overflow: hidden
        top: 1.6rem
        left: 0
        right: 0
        bottom: 0
        .title
            line-height: .54rem
            background: #eee
            padding-left: .26rem
            color: #666
        .button-list
            padding: .1rem .6rem .1rem .1rem
            overflow: hidden
            .button-wrapper
                float: left
                width: 33.33%
                .button
                    margin: .1rem
                    padding: .1rem 0
                    border-radius: .06rem
                    text-align: center
                    border: .02rem solid #ccc
        .item-list
            .item
                line-height: .76rem
                padding-left: .2rem
</style>
